(Lianja) SSH Public Key Authentication

Demonstrates how to authenticate with an SSH server using public key authentication.

Chilkat Lianja Extension Download Chilkat Lianja Extension

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

loSsh = createobject("CkSsh")

// Set some timeouts, in milliseconds:
loSsh.ConnectTimeoutMs = 5000
loSsh.IdleTimeoutMs = 15000

// Connect to the SSH server.  
// The standard SSH port = 22
// The hostname may be a hostname or IP address.
lcHostname = "sftp.example.com"
lnPort = 22
llSuccess = loSsh.Connect(lcHostname,lnPort)
if (llSuccess <> .T.) then
    ? loSsh.LastErrorText
    release loSsh
    return
endif

loKey = createobject("CkSshKey")

// Read the PEM file into a string variable:
// (This does not load the PEM file into the key.  The LoadText
// method is a convenience method for loading the full contents of ANY text
// file into a string variable.)
lcPrivKey = loKey.LoadText("myPrivateKey.pem")
if (loKey.LastMethodSuccess <> .T.) then
    ? loKey.LastErrorText
    release loSsh
    release loKey
    return
endif

// Load a private key from a PEM string:
// (Private keys may be loaded from OpenSSH and Putty formats.
// Both encrypted and unencrypted private key file formats
// are supported.  This example loads an unencrypted private
// key in OpenSSH format.  PuTTY keys typically use the .ppk
// file extension, while OpenSSH keys use the PEM format.
// (For PuTTY keys, call FromPuttyPrivateKey instead.)
llSuccess = loKey.FromOpenSshPrivateKey(lcPrivKey)
if (llSuccess <> .T.) then
    ? loKey.LastErrorText
    release loSsh
    release loKey
    return
endif

// Authenticate with the SSH server using the login and
// private key.  (The corresponding public key should've 
// been installed on the SSH server beforehand.)
llSuccess = loSsh.AuthenticatePk("myLogin",loKey)
if (llSuccess <> .T.) then
    ? loSsh.LastErrorText
    release loSsh
    release loKey
    return
endif

? loSsh.LastErrorText
? "Public-Key Authentication Successful!"


release loSsh
release loKey